Available Definitions:
1) a. - Indicating order or succession; as, the ordinal numbers, first, second, third, etc.
2) a. - Of or pertaining to an order.
3) n. - A word or number denoting order or succession.
4) n. - The book of forms for making, ordaining, and consecrating bishops, priests, and deacons.
5) n. - A book containing the rubrics of the Mass.